It depends entirely on the race being considered, i.e. how many people are racist towards Blacks vs. how many people are racist against Whites, what regions are considered, i.e. how many people are racist in the USA vs. how many people are racist in Europe, and how the regions are defined in magnitude, i.e. how many people are racist in South Carolina vs. how many people are racist in the USA.
Probably because you know it's wrong and don't pretend that it's okay to be racist. This happens to some racist; though they feel they can't change their feelings towards a particular race because they truly think in their minds, the negativity towards the particular race holds fact, they still feel remorseful for singling them out and being bitter about things when they don't want to feel that way.
"Turn racist" seems to imply that there is a switch and that somebody who did not have a shred of racism suddenly becomes racist. Of course, this does not happen. However, numerous encounters with racist individuals do have a tendency to make a person more inclined to be racist than people who have no such encounters.
People decide if they won't to stop being racist. Now, if it's uncontrollable, then that person needs to see a mental doctor. Either that. or that's how they were raised; to be racist. And if your asking me if I'm racist... no! You shouldn't ask questions like that to the world. Your not just asking me, your asking everybody. And your not going to get a solid answer, because some people are racist. So that…